It was discovered that openssl did not correctly handle explicitInitialization Vectors for CBC encryption modes, as used in TLS 1.1,1.2, and DTLS. An incorrect calculation would lead to an integerunderflow and incorrect memory access, causing denial of service(application crash.)

For the stable distribution (squeeze), this problem has been fixed inversion 0.9.8o-4squeeze13.

For the testing distribution (wheezy), and the unstable distribution(sid), this problem has been fixed in version 1.0.1c-1.

We recommend that you upgrade your openssl packages.

Further information about Debian Security Advisories, how to applythese updates to your system and frequently asked questions can befound at: http://www.debian.org/security/